Currencies are units of exchange used in buying and selling, and they are a fundamental tool in the global economy. Currencies vary from one country to another, such as the US dollar, euro, British pound, and Saudi riyal. Some are used only locally, while others are accepted globally. With the advancement of technology, digital currencies like Bitcoin have emerged, which do not require an intermediary like banks. The strength of a currency affects purchasing power and international trade. Thus, currency stability is an important indicator of the health of the national economy. It is important to monitor exchange rates and understand their impacts on our daily lives.